21464519 has 8 divisors (see below), whose sum is σ = 21732480. Its totient is φ = 21198456.

The previous prime is 21464503. The next prime is 21464539. The reversal of 21464519 is 91546412.

21464519 = T₂ + T₃ + ... + T₅₀₄.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21464519 - 2⁴ = 21464503 is a prime.

It is a super-2 number, since 2×21464519² = 921451151802722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21464539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42422 + ... + 42924.

It is an arithmetic number, because the mean of its divisors is an integer number (2716560).

Almost surely, 2^21464519 is an apocalyptic number.

21464519 is a deficient number, since it is larger than the sum of its proper divisors (267961).

21464519 is a wasteful number, since it uses less digits than its factorization.

21464519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949.

The product of its digits is 8640, while the sum is 32.

The square root of 21464519 is about 4632.9816533200. The cubic root of 21464519 is about 277.9118425507.

The spelling of 21464519 in words is "twenty-one million, four hundred sixty-four thousand, five hundred nineteen".